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DK 8 Digestion Unit

Kjeldahl Digestion Units with 8-position aluminum heating block that offers an excellent thermal homogeneity.

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Thermal homogeneity and precision

The DK 8 Series digestion unit with aluminum heating block ensures high thermal homogeneity heating up to 450 °C. The temperature of the block is constantly controlled by a microprocessor and is extremely stable, homogeneous and precise: ±0.5°C at all selectable temperatures.

The DK 8 Series guarantees accuracy and repeatability. The DK 8 performs batch digestion of up to 8 samples with 250 ml test tubes - Ø 42 m, reducing the energy consumption (-13% compared to the previous series). Low energy consumption provides lower costs of analysis and limits CO2 release.

Space saving design

The design of the DK series has been carefully engineered to allow laboratories to save valuable space under the hood.

DK Digesters have very compact dimensions: the new aluminum heating block has been lowered and the vertical proportions allow to free precious space in the laboratory.

The structure is made of stainless steel that has been specifically designed and tested to ensure strong resistance to chemicals and mechanical stress.

The aluminum block protection grid provides enhanced heating performance and protects the heating block from splashes and chemicals.

Easy-to-use with the intuitive digital interface

The bright digital display provides maximum visibility and easy-to-read information.

The instrument is operated with 4 keys to navigate the menu options and program the digestions in a simple and fast way.

Through the intuitive graphic display it is possible to set up to 20 methods with 4 temperature ramps.

Acoustic signals inform the operator of the completion of the analysis facilitating the daily use of the digester.

The inclination of the front panel protects it from chemical spillage at high temperatures.

Fume Neutralization System

For application where the digestion process produces fumes, acid gases or corrosive substances, the below specific accessories are strongly recommended:

JP Pump aspirates noxious fumes
SMS Scrubber neutralizes all the fumes

TEMS™ Technology

DK Series Kjeldahl digestion units work with the innovative TEMS™ benefits, for huge savings.

Time Saving: rapid heating reduces wasted time
Energy Saving: limited energy consumption thus cutting CO₂ emissions
Money Saving: cost reduction for each analysis
Space Saving: the narrow footprint saves valuable laboratory bench space

Models

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Included/required accessories: {{productIncludedAccessories.Accessories.length + productRequiredAccessories.Accessories.length}}

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Genuine consumables for your digestions

Choosing the right consumables allow the optimization of analytical operations to achieve the highest possible performance of your Digestion Unit. We strongly recommend the use of VELP original consumables in order to be sure to obtain the best performance form your VELP instrument.

The addition of a suitable catalyst, along with high temperature, have influence on the speed and the efficiency of the mineralization in Kjeldahl analysis. Achieving the highest level of performance in a wide range of Kjeldahl applications is now possible with VELP genuine KjTabs™ catalyst and antifoaming tablets.

VELP Nitrogen Free Weighing Boats are the perfect solution to all the difficult transfer operations of powders or syrupy samples into mineralization test tubes.

TECHNICAL DATA

Construction material:	Epoxy painted with chemical resistant coating
Temperature range:	Ambient to 450 °C / 842 °F
Stability of the heating block temperature:	± 0,5 °C
Precision of the heating block temperature:	± 0,5 °C
Set temperature:	Digital readout in °C or °F
Temperature Calibration:	Automatic
Selectable ramps:	up to 4 per program
Digestion time range:	1 to 999 minutes
Time selection:	1 minute steps
Countdown:	Digital readout
Selectable language:	EN, IT
Heating Places	8-position
Size of tubes	250 ml test tubes (Ø 42 mm)
Power:	1150 W
Dimensions (WxHxD): (aluminum block only)	230x140x420 mm 9.1x5.5x16.5 in
Dimensions (WxHxD):	230x690x420 mm 9.1x17.2x16.5 in
Weight:	11 kg (24.2 lb)

Brochures & Leaflets

VELP Scientifica invites you to download brochures and leaflets in order to explore our premium quality solutions and to have all the major key arguments, features and specifications of a product in your hands, in any place, and at any time.

DK Series Kjeldahl Digestion Units - BrochureLearn more about our efficient and reliable Kjeldahl Digesters, with aluminum heating block offering excellent thermal homogeneity.

Valuable Information On Kjeldahl MethodLearn more about the Kjeldahl principle, first described by Johan Kjeldahl over a century ago (1883).

Application notes

Choose among a comprehensive library of Application Notes / White Papers and learn more on how to optimize the performance of your VELP instruments. These documents offer typical analyses of well-known samples, together with official references and suggestions, to make you an expert!

E-book - Barley and Feed: N/Protein Determination and Fiber DeterminationDiscover more about the nutritional properties of barley and how to determine n/protein and fiber to optimize livestock operations. Download the e-book with results on BIPEA proficiency testing sample.

E-book - Kjeldahl and Dumas Method Comparison: N/Protein Determination in FeedDiscover more about the Kjeldahl and Dumas methods for the determination of n/protein in various feed samples, a key parameter concerning quality control and protein declaration. Download the e-book with results on BIPEA proficiency testing samples and a comprehensive comparison of the two techniques.

Casein Determination in Milk - Kjeldahl methodCasein proteins are a family of proteins involved in the production of cheese and fermented milk. They are also extremely important nitrogen compounds in the dairy products production, additives in medicine, and have a technical use in cosmetics, paints and adhesives.
Learn how to obtain excellent performance with DK / DKL and UDK Series and how to work in accordance with AOAC and ISO.

N/Protein Determination in Cereals - Kjeldahl methodCereals contain between 8-15% of different kinds of proteins such as albumins, globulins, prolamines, gliadins, glutelins and glutenins. Their chemical composition is important not only for nutritional purposes, but also for the bread dough and its process of baking and for economical reason. Learn how to obtain excellent performance with DK / DKL and UDK Series and how to work in accordance with AOAC and AACC.

N/Protein Determination in Cheese - Kjeldahl methodDue to the greater demand and consumption of dairy products, protein analysis has become more and more important to ensure food safety, food quality and fairness in international trade. Learn how to obtain excellent performance with DK / DKL and UDK Series, and how to work in accordance with ISO and AOAC.

N/Protein Determination in Feed - Kjeldahl methodProtein is a critical nutrient in cattle, pigs, poultry, sheep, horses and pet food diets. It is required for milk production and reproductive tract reconditioning after calving.
Learn how to obtain excellent performance with DK / DKL and UDK Series and how to work in accordance with AOAC.

N/Protein Determination in Fishmeal - Dumas and Kjeldahl method comparisonFishmeal is an important food used in animal husbandry and in aquaculture. It is also the main ingredient of the commonly marketed feed for aquarium fish. Discover more on the results obtained with the Kjeldahl and the Dumas Method for the determination of protein content in fishmeal.

N/Protein Determination in Milk - Kjeldahl methodThe protein fraction includes caseins (80%) and whey proteins (20%) and it is of interest, not only from the nutritional point of view, but also from a technological one. Milk proteins have particular chemical properties which contribute to create typical sensory features, influencing the whole food processing. Learn how to obtain excellent performance with DK / DKL and UDK Series and how to work in accordance with AOAC and ISO.

N/Protein Determination in Milk Powder - Kjeldahl methodMilk powders contain all twenty-one standard amino acids, the building blocks of proteins, and are high in soluble vitamins and minerals. Compared to liquid milk, this product has a far longer shelf life and does not need to be refrigerated, due to its low moisture content.
Learn how to obtain excellent performance with DK / DKL and UDK Series and how to work in accordance with AOAC and ISO.

N/Protein Determination in Nuts - Kjeldahl methodNuts are an excellent source of protein and healthy fats; their amounts vary depending on the type of nut.
Peanuts, for example, provide a good source of B vitamins essential for energy, protein metabolism, and the synthesis of red blood cells and their protein content is about 29%.
Learn how to obtain excellent performance with DK / DKL and UDK Series and how to work in accordance with AOAC.

N/Protein Determination in Probiotic Drinks - Kjeldahl methodA probiotic is a live microbial food ingredient that beneficially affects the host through its effects in the intestinal tract. They are widely used to prepare fermented dairy products.
Learn how to obtain excellent performance with DK / DKL and UDK Series and how to work in accordance with AOAC and ISO.

Nitrogen Determination in Water & Sludge - Kjeldahl methodThe properties of water, waste water and sludge vary considerably depending upon their source. For example, in unpolluted waters, low nitrogen levels make it necessary to use large sample volumes. Learn how to obtain excellent performance with DK / DKL and UDK Series and how to work in accordance with AOAC, EPA and ISO.

Whey Protein Determination in MilkIn order to determine soluble whey proteins (WP), it is necessary to know the amount of milk total nitrogen (Ntot), non-casein nitrogen (NCN) and non-proteins nitrogen substances (NPN).
Learn how to obtain excellent performance with DK / DKL and UDK Series and how to work in accordance with AOAC and ISO.

Certifications

Our compliance to statutory rules and regulations worldwide.
With the CE mark, VELP Scientifica declares that the products are designed and manufactured in compliance with the essential safety requirements of the European Directive on Safety.
The Certification Body (CB) Certificate is an international program created by the IECEE for the acceptance of product safety test results among participating laboratories and certification organizations around the world.
The cNEMKOus mark ensures this product is designed and manufactured in compliance with the International Directive on Safety IEC/EN 61010-1. The cNEMKOus mark has the same legal status as any other NRTL/SCC accredited marks, for U.S. and Canada.

CE Declaration of Conformity VELP Scientifica Digestion System and HidrolysisWith the CE mark, VELP Scientifica declares that the products are designed and manufactured in compliance with the essential safety requirements of the European Directive on Safety, matching EU consumer safety, health or environmental requirements.

DK 8 Digestion Unit

Thermal homogeneity and precision

Space saving design

Easy-to-use with the intuitive digital interface

Fume Neutralization System